This fault code 3569 DTCs document explains diagnostic information for SCR diesel exhaust fluid dosing line faults. It covers the 08-fc3569 path selection and separate air-assisted and airless fault descriptions for SPN 3362 FMI 7.
Official fault code 3569 DTCs document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB6.7 CM2150 (2007-09) group listing; extract also references ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, ISZ13 CM2150, ISM11 CM876 SN, ISF2.8 CM2220 AN, and ISF3.8 CM2220 AN. |
| System/Group | DTCs; aftertreatment diesel exhaust fluid dosing unit input lines; SCR dosing system. |
| Publication no. | 08-fc3569 |
| Year/Revision | Last Modified: 03-Feb-2011; air-assisted and airless sections Last Modified: 07-Jan-2011. |
| Pages | 6 |
| File size | 0.3 MB |
| Format | |
| Language | English |
Document table of contents
- Fault Code Path Selection
- Is the selective catalytic reduction (SCR) dosing system air-assisted?
- Is the selective catalytic reduction (SCR) dosing system airless?
- FAULT CODE 3569 (Air-assisted)
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Conditions for Setting the Fault Codes
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- FAULT CODE 3569 (Airless)
Applicable truck models
The document applies to Cummins aftertreatment diagnostic coverage shown in the extract, including ISB4.5, ISB6.7, ISD4.5, ISD6.7 CM2150 SN, ISL8.9 CM2150 SN, ISZ13 CM2150, ISM11 CM876 SN, ISF2.8 CM2220 AN, and ISF3.8 CM2220 AN. The file group identifies ISB6.7 CM2150 (2007-09) DTCs, while the fault sections also list related Cummins engine platforms using SCR diesel exhaust fluid dosing circuits. For manufacturer information, see Cummins official website.
Who needs this fault code 3569 DTCs manual
This reference is for diesel mechanics, fleet technicians, and workshop owners diagnosing amber CHECK ENGINE or MIL events linked to DEF delivery faults. It is useful when checking blocked or restricted aftertreatment nozzles, dosing valves, nozzle supply lines, dosing valve supply lines, and diesel exhaust fluid dosing unit behavior with INSITE™ electronic service tool.
The air-assisted section states that the dosing unit can build pressure but cannot spray diesel exhaust fluid into the exhaust stream, with possible causes including a blocked or restricted aftertreatment nozzle, a blocked or restricted nozzle supply line, or a malfunctioning diesel exhaust fluid dosing unit. The airless section states that the dosing unit can build pressure but cannot complete the priming cycle, and it instructs technicians to troubleshoot other active SCR related faults first. Both sections explain that the active fault cannot be cleared directly with INSITE™; repair validation requires the Diesel Exhaust Fluid Doser Pump Override Test or Diesel Exhaust Fluid Doser Override Test, then verification that the fault code 3569 DTCs status becomes inactive.
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